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Kisachek [45]
1 year ago
9

For something to combust, it must have ____________.

Chemistry
2 answers:
Wewaii [24]1 year ago
8 0
The answer would be B
docker41 [41]1 year ago
6 0

╰┈➤\: \huge\color{pink}{\bold{Answer}}

For something to combust, it must have <em>Oxygen</em><em> </em>

  • A. Carbon dioxide
  • <u>B. Oxygen</u>
  • C. Water
  • D. Nitrogen

\:  \:  \:

╰┈➤\: \huge\color{pink}{\bold{Explanation}}

  • We don't have to keep lighting a campfire, it just keep burning

  • To summarize, for combustion to occur three things must be present: a fuel to be burned, a source of oxygen, and a source of heat

\:  \:  \:

So choose letter B

\color{pink}──────────────────────────────

\mathfrak \red{ -  \: Cherrrry \: Red}

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Elements with atomic numbers 7 and 83 have how many valence electrons? *
IRINA_888 [86]

Explanation:

element with atomic numbers 7 and 83 have 5 and 5 valence electrons

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A series circuit has two 5.0-ohm resistors and a power source of 9.0 volts. How will the current be affected and what will it be
miskamm [114]
The formula for solving current given with resistance and power source or voltage is shown below:
I = V/R  

When two 5 ohms resistors are in series, we have:
I = 9 volts / (5+5 ohms)
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When it is being added with another 7.5 resistors, we have:
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The answer to the question is the letter "D. decrease; 0.51 amps".
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3 years ago
the atomic number of barium is 56 what do you know about the subatomic particles in an atom of this element
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Answer is 56 protons and 56 electrons.

<em>Explanation;</em>

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But same element can have different number of neutrons. Those are called isotopes. Hence, we cannot say that there are 56 neutrons in barium atom without having its mass number. (Mass number = number of protons + number of neutrons)

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Answer:

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How are all cells similar?
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